When using the MonoVM, we compare MonoClass instances by pointer. This turns
out a bit complicated for CoreCLR, because our MonoClass instances are not
unique (there can be multiple MonoClass instances that refer to the same
type), so instead implement helper methods that do the comparison. This also
has the benefit of not requiring any memory allocations on CoreCLR.
* The generated static registration code will eventually be different.
* The generated code has to be compiled with different compiler flags.
This also required adding a new overload of xamarin_mono_object_release for the generated
code to compile.
This also meant reviewing calling code to make sure that MonoObject*s are
released when they should be, which meant reviewing every method that returns
a MonoObject*, and release the result.
This required adding a helper method to get the assembly name for a given
MonoAssembly, since that's what CoreCLR uses to determine what to execute.
Co-authored-by: Manuel de la Pena <mandel@microsoft.com>
We need a way to represent a managed object in native code, and since most our existing
runtime code uses MonoObjects, we use the same for the CoreCLR bridge, just our own
version of it. In Mono, the MonoObjects are tracked by the GC (which scans the stack),
but we can't make CoreCLR scan the stack, so we use a reference counted version of
MonoObject instead - we just put the GCHandle into a reference counted MonoObject,
and when the MonoObject is freed, then we free the GCHandle as well.
* Move the existing logic to call Runtime.Initialize into the MonoVM code.
* Implement calling the managed Runtime.Initialize method from the CoreCLR bridge.
The call to Runtime.Initialize succeeds, which means we're now executing
managed code with CoreCLR for the first time.
If no exception handling is provided when calling a managed delegate from native
code, and the managed code throws, then we'll abort.
It's not entirely clear how we'll handle managed exceptions that go through native
code yet, so this makes the initial implementation easier. By making the exception
handling optional, it'll be easy to find all cases where we need to fix it later,
by making it non-optional. The alternative is to add exception handling code all
over the place that would potentially have to be updated when we figure out exactly
what needs to be done.
We need to call coreclr_initialize/monovm_initialize at startup, so do that.
This is a partial implementation, in that we're not setting all the properties
that we should, and also the PINVOKE_OVERRIDE callback is not doing everything
it should either yet.
Ref: #10504.
* [runtime] Download the CoreCLR embedding header file
* [runtime] Create VM-specific code and header files and include them in the build
* [runtime] Move MonoVM-specific initialization to MonoVM-specific code.
Rolf Bjarne Kvinge